Abstract: An elevator and an elevator control method are provided. The elevator includes a car (4) and counterweights (10); the elevator includes posts (2), a steel frame structure (13), and a power device (7), where the steel frame structure (13) is fixed on the top of the elevator, and the power device (7) is fixedly installed on the steel frame structure (13); and the counterweights (10) are disposed in the posts (2).

Abstract: A resistance welding high frequency transformer and a high frequency resistance welding machine using the same are disclosed. The transformer comprises a magnetic core (6), primary coils (1, 2, 3) and secondary coils (4, 5). The primary coils and the secondary coils are alternatively positioned layer by layer. Each secondary coil is arranged between two primary coils. The primary coils are provided at the internal side and the external side of the secondary coil. The secondary coil is composed of red copper pipes through which water flows. Each secondary coil is wound with one to two turns. The red copper pipes of the secondary coils and rectifier diodes constitute a full-wave rectifier circuit. The resistance welding high frequency transformer can be wound conveniently.

Abstract: A sub-high frequency transformer with water-cooled heat dissipation includes a magnetic core (8), primary coils (10), secondary coils (9a1, 9a2, 9b1, 9b2, 9c1, 9c2, 9d1, 9d2), secondary leading terminals of the transformer, and a rectifying tube circuit connected with the secondary leading terminals of the transformer. The rectifying tube circuit includes plane-type rectifying diodes (11, 12), positive leading plates (3, 4, 5, 6) of the diodes, a rectifier positive output plate (2), and a rectifier negative output plate (1) which is also the central tap of the transformer. A secondary current of the transformer, after being rectified by the plane-type rectifying diodes, is connected to and is output from the rectifier positive output plate. The positive leading plates of the plane-type rectifying diode, the rectifier positive output plate and the rectifier negative output plate have a copper plate structure with a certain thickness and having water passages for heat dissipation inside.

Abstract: A resistance welding high frequency transformer and a high frequency resistance welding machine using the same are disclosed. The transformer comprises a magnetic core (6), primary coils (1, 2, 3) and secondary coils (4, 5). The primary coils and the secondary coils are alternatively positioned layer by layer. Each secondary coil is arranged between two primary coils. The primary coils are provided at the internal side and the external side of the secondary coil. The secondary coil is composed of red copper pipes through which water flows. Each secondary coil is wound with one to two turns. The red copper pipes of the secondary coils and rectifier diodes constitute a full-wave rectifier circuit. The resistance welding high frequency transformer can be wound conveniently.